Kill dead IFWL_*::Initialize() variants dead.

xfa/include/fwl/core/fwl_form.h

Index: xfa/include/fwl/core/fwl_form.h
diff --git a/xfa/include/fwl/core/fwl_form.h b/xfa/include/fwl/core/fwl_form.h
index b06d5742e91342f90c93a379616e8079e24b9a0d..6d76c614d0256b591dab2ad7569f6b2e9eae5dbc 100644
--- a/xfa/include/fwl/core/fwl_form.h
+++ b/xfa/include/fwl/core/fwl_form.h
@@ -66,12 +66,9 @@ enum FWL_COMMANDID {
 class IFWL_Form : public IFWL_Panel {
  public:
   static IFWL_Form* Create();
-  FWL_ERR Initialize(IFWL_Widget* pOuter = NULL);
-  FWL_ERR Initialize(CFWL_WidgetImpProperties& properties,
-                     IFWL_Widget* pOuter = NULL);
   FWL_ERR Initialize(CFWL_WidgetImpProperties& properties,
                      CFX_WideString* classname,
-                     IFWL_Widget* pOuter = NULL);
+                     IFWL_Widget* pOuter);
   FWL_FORMSIZE GetFormSize();
   FWL_ERR SetFormSize(FWL_FORMSIZE eFormSize);
   IFWL_Widget* DoModal();